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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2000,2007 Oracle. All rights reserved.
*
* $Id: util_cache.c,v 12.6 2007/05/17 15:14:55 bostic Exp $
*/
#include "db_config.h"
#include "db_int.h"
/*
* __db_util_cache --
* Compute if we have enough cache.
*
* PUBLIC: int __db_util_cache __P((DB *, u_int32_t *, int *));
*/
int
__db_util_cache(dbp, cachep, resizep)
DB *dbp;
u_int32_t *cachep;
int *resizep;
{
u_int32_t pgsize;
int ret;
/* Get the current page size. */
if ((ret = dbp->get_pagesize(dbp, &pgsize)) != 0)
return (ret);
/*
* The current cache size is in cachep. If it's insufficient, set the
* the memory referenced by resizep to 1 and set cachep to the minimum
* size needed.
*
* Make sure our current cache is big enough. We want at least
* DB_MINPAGECACHE pages in the cache.
*/
if ((*cachep / pgsize) < DB_MINPAGECACHE) {
*resizep = 1;
*cachep = pgsize * DB_MINPAGECACHE;
} else
*resizep = 0;
return (0);
}
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